AskDefine | Define perturbation

Dictionary Definition



1 an unhappy and worried mental state; "there was too much anger and disturbance"; "she didn't realize the upset she caused me" [syn: disturbance, upset]
2 (physics) a secondary influence on a system that causes it to deviate slightly
3 activity that is an intrusion or interruption; "he looked around for the source of the disturbance"; "there was a disturbance of neural function" [syn: disturbance]
4 a disposition that is confused or nervous and upset [syn: fluster]
5 the act of causing disorder [syn: disruption]

User Contributed Dictionary



perturb + -ation



  1. Agitation; the state of being perturbed
  2. A small change in a physical system, or more broadly any definable system (such as a biological or economic system)
  3. , (astronomy) Variation in an orbit due to the influence of external bodies




From perturbatio.


fr-noun f

Extensive Definition

Perturbation or perturb may refer to any of numerous concepts in several fields:
perturbation in German: Perturbation
perturbation in Spanish: Perturbación
perturbation in French: Perturbation
perturbation in Russian: Пертурбация

Synonyms, Antonyms and Related Words

ado, aggravation, agitation, all-overs, angst, animation, anxiety, anxiety hysteria, anxiety neurosis, anxious bench, anxious concern, anxious seat, anxiousness, apprehension, apprehensiveness, arousal, arousing, baffle, bafflement, befuddlement, bewilderment, bluster, bobbery, boil, boiling, bother, botheration, brouhaha, bustle, cankerworm of care, care, chaos, chills of fear, churn, cloud, cold creeps, cold shivers, cold sweat, commotion, concern, concernment, confoundment, confusion, conturbation, convulsion, creeps, daze, derangement, dilemma, disarrangement, disarray, disarticulation, discombobulation, discomfiture, discomposure, disconcert, disconcertedness, disconcertion, disconcertment, disharmony, dishevelment, disintegration, disjunction, dislocation, disorder, disorderliness, disorganization, disorientation, disproportion, disquiet, disquietude, disruption, distress, disturbance, dread, ebullience, ebullition, eddy, effervescence, electrification, embarrassment, embroilment, enigma, entropy, exacerbation, exasperation, excitation, excitement, exhilaration, fear, fear and trembling, feery-fary, ferment, fermentation, fever, feverishness, fidgets, fix, flap, flummox, flurry, fluster, flutter, flutteration, fog, foment, fomentation, foreboding, forebodingness, frenzy, fuddle, fuddlement, fume, fuss, galvanization, goose bumps, gooseflesh, haphazardness, haze, heartquake, horripilation, hubbub, hurly-burly, hurry, hurry-scurry, incitement, incoherence, indiscriminateness, inflammation, infuriation, inharmonious harmony, inquietude, insanity, irregularity, irritation, jam, jimjams, jitters, jumble, jumpiness, lathering up, maelstrom, malaise, maze, mess, misarrangement, misgiving, mist, moil, most admired disorder, muddle, muddlement, mystery, nerviness, nervous tension, nervousness, nonplus, nonsymmetry, nonuniformity, overanxiety, palpitation, pell-mell, perplexity, pickle, pins and needles, plight, pother, predicament, problem, promiscuity, promiscuousness, provocation, pucker, puzzle, puzzlement, quaking, quandary, quiver of terror, randomness, restlessness, riddle, roil, rout, row, ruffle, scrape, seethe, seething, shivers, shuffle, shuffling, solicitude, steaming up, stew, stimulation, stimulus, stir, stirring, stirring up, strain, suspense, sweat, swirl, swirling, swivet, tension, thrill of fear, tizzy, to-do, trepidation, trepidity, trouble, tumult, tumultuation, turbidity, turbulence, turmoil, twitter, unassuredness, unease, uneasiness, unquietness, unrest, unsettlement, unsymmetry, ununiformity, uproar, upset, vexation, vortex, whipping up, whirl, working up, yeastiness, zeal
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